Argyle King
Legend
THAT is actually, in my opinion, the greater problem presented by the 2024 rules. Hidden actually makes more sense than the spell does. I would home rule that the Invisibility granted by the spell is your typical fantasy invisibility, aka translucent. I would add text to the spell that says, "a creature using normal vision cannot perceive you," or something like that.
I think that could work.
Alternatively, you could write a lot less by having a "hidden" condition, instead of trying to use "invisible" to mean multiple things.